MERCK & CO INC revenue for the last year amounted to 64.04 T CLP, the most of which — 57.29 T CLP — came from its highest performing source at the moment, Pharmaceutical, the year earlier bringing 47.25 T CLP. The greatest contribution to the revenue figure was made by United States — last year it brought MERCK & CO INC 32.21 T CLP, and the year before that — 25.11 T CLP.